Compared Methods. We compare our method with two region-based losses, SoftIOU [1]} and Lovasz softamax [2]}. We also compare with statistics-balanced loss including Weighted, also known as the Inverse-frequency (Weighted CE), Cross-Entropy loss Balanced Cross-Entropy loss (Balanced CE) [3]}, and Online Hard Example Mining (OHEM) loss [4]}. We keep top \(70\%\)  samples in OHEM. We also compare to the performance-based loss, Focal loss [5]}, in our experiments. Please refer to Appendix REF  for more details on experimental setting.
